Note 3 - Inventories

3 Months Ended

Mar. 31, 2022

Notes to Financial Statements

Inventory Disclosure [Text Block]

3. INVENTORIES

Inventories are summarized as follows:

		March 31, 2022
	(unaudited)			December 31, 2021
Raw materials	$	656,525		$	629,090
Work-in-process		317,494			339,746
Finished goods		674,735			482,972
Inventory allowance		(9,712	)		(12,794	)
Inventory, net	$	1,639,042		$	1,439,014

As of March 31, 2022 and December 31, 2021 there was an inventory allowance of $9,712 and $12,794, respectively, for potential obsolete inventory.